Home > November, 2009

At my company we are using Exchange 2007 Cluster Continuous Replication (CCR) for local, highly-available Exchange 2007 mailboxes. Then we use Standby Continuous Replication (SCR) to replicate our mailbox databases and logs to another server in a secondary site to provide Disaster Recovery and site-resiliency.


Archived in the category: Exchange Server, Technology
Posted by Dave on 12 Nov 09 - 0 Comments


This past Monday Ross Smith from Microsoft Exchange Team, posted the Exchange 2010 Mailbox Server Role Requirements Calculator during one of his sessions at the Exchange Connections conference in Las Vegas.  This tool is the equivalent of the Exchange 2007 Storage Calculator.  It’s actually a giant Excel spreadsheet.  It’s a useful tool to assist in […]

Determining Uptime – What does five 9s mean?

Archived in the category: Technology, Tools
Posted by Dave on 03 Nov 09 - 0 Comments

If there is one thing I learned early in my career, it is “metrics can show you anything you want them to show”. One metric companies often use to measure the availability or uptime of their systems is “number of 9s”. Computer system uptime is often measured by the percentage of uptime/availability in a year. […]

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